45431777 has 4 divisors (see below), whose sum is σ = 46998420. Its totient is φ = 43865136.

The previous prime is 45431761. The next prime is 45431791. The reversal of 45431777 is 77713454.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25441936 + 19989841 = 5044^2 + 4471^2 .

It is a cyclic number.

It is not a de Polignac number, because 45431777 - 2⁴ = 45431761 is a prime.

It is a super-2 number, since 2×45431777² = 4128092722755458, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45431777.

It is not an unprimeable number, because it can be changed into a prime (45431707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 783278 + ... + 783335.

It is an arithmetic number, because the mean of its divisors is an integer number (11749605).

Almost surely, 2^45431777 is an apocalyptic number.

It is an amenable number.

45431777 is a deficient number, since it is larger than the sum of its proper divisors (1566643).

45431777 is a wasteful number, since it uses less digits than its factorization.

45431777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1566642.

The product of its digits is 82320, while the sum is 38.

The square root of 45431777 is about 6740.3098593462. The cubic root of 45431777 is about 356.8233295331.

The spelling of 45431777 in words is "forty-five million, four hundred thirty-one thousand, seven hundred seventy-seven".